A negligibly small current is passed through a wire of length 15 m and uniform cross-section 6.0×10−7m2, and its resistance is measured to be 5.0Ω. What is the resistivity of the material at the temperature of the experiment?
Let resistivity coefficient be ρ
R=ρlA
ρ=RAl
ρ=2×10−7Ωm